Well, I keep calling them "sails" but the more technical term is probably "drive grids." The general idea is that they capture and focus the spatial distortion from the FTL drive, possibly as a means of increasing navigational accuracy. However, these probably won't appear on many other ship designs, if any, so they may have been a one-off tech innovation that proved impractical on other ship classes or something like that.

As for the dislike on YouTube, ehh, whatever. Some people have nothing better to do. It's really just a rigging test anyway, so I'm not gonna lose any sleep over it.

Maybe easier to say that the sails are one of several drive grid configurations, much like a turboprob v. a jet. The Polaris—being a converted civilian vessel—has this type, whereas most dedicated warships have a less-efficient fixed system designed to be more survivable in combat. How's that?

I kind of preferred the old concept of the undersides of the folding bits being the "sails." Just seems a bit overly elaborate for a propulsion system to me. Great work with the execution though.

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Maybe that's why they're unique to this class. You can drop the ship on a dime over 50 lightyears but it's a bitch to maintain and repair. And God help you if one of the grids gets knocked out of alignment.

I call them grids and/or sails in the script, I think, and I like to think of them as sails - with grids in them. How's that?

Warships and other very large vessels sort of "brute force" the FTL drive using lots of energy channeled through fixed structures. Small vessels like Polaris are somewhat more nimble.

Or, more or less what Vektor and Maurice said.

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Or perhaps another way of putting it is ships meant for war, and most likely to take some form of damage, have these strong structures, which as I understand it, like all (or most) other ships in this universe, either projects the field that warps space (like an Alcubierre drive), helps to control it, or both?

They can take a little (or perhaps more than a little) beating, before they will no longer work. But they take more power, and therefore bigger reactors are necessary, and maneuverability at FTL speeds isn't as good as ships that have sails instead. Perhaps the FTL drive might even need prepping before going to FTL, or navigational points need to be inputted (like in Battlestar Galactica or Star Wars), instead of simply being able to go to FTL at the push of a button or few or the push of a lever (like in Star Trek), or it is possible to go to FTL suddenly, but it has to be at a slower speed to avoid colliding with something or ending up in a black hole or star.

Starships with these sails on the other hand are more efficient, requiring less power, are much more agile at FTL speeds (perhaps even being capable of running circles around much larger vessels at FTL speeds, at which they are extremely difficult to hit?), and can go to and drop out of FTL at the pilot's whim, with little need prep the FTL drive or input navigational points. This however comes at the price that these sails are somewhat fragile, and most damage taken will usually require service at a starbase (or whatever terminology is used in that universe referring to a space station), or a repair vessel. Most vessels that use sails either are never expected to see combat any other situation that would cause sufficient damage, or are too small to carry reactors powerful enough to power shields, but have a role where agility is key (such as a fighter).

It may be worth noting that Polaris' FTL drive makes effectively instantaneous jumps from point A to point B, regardless of distance, or at least that's how it appears to work in the script. In other words, this isn't warp drive or even hyperdrive, it's much more like NuBSG's jump drive.

Probably it is. Some early drafts of the story had action aboard ship during periods of time that they were in hyperspace or whatever, but I cut all that back in simplifying the story, so anything we were to develop going forward could probably use either the "instant jump" premise or a different one if we chose.

^Leave it nebulous so the fanboys have something to debate about in the coming years.

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I agree.

In the unfilmed Exeter episode "The Atlantis Invaders" I deliberately didn't specify impulse or warp engines during a chase sequence because saying either raised questions that weren't important to the narrative (if they're at impulse, why not go to warp...if at warp, can you use phasers or transporters?). Furthermore, it left options open to the effects guys on how to portray it or whether to use any stock shots in the sequence. Sometimes being less specific is the right way to go.

Probably it is. Some early drafts of the story had action aboard ship during periods of time that they were in hyperspace or whatever, but I cut all that back in simplifying the story, so anything we were to develop going forward could probably use either the "instant jump" premise or a different one if we chose.

^Leave it nebulous so the fanboys have something to debate about in the coming years.

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I agree.

In the unfilmed Exeter episode "The Atlantis Invaders" I deliberately didn't specify impulse or warp engines during a chase sequence because saying either raised questions that weren't important to the narrative (if they're at impulse, why not go to warp...if at warp, can you use phasers or transporters?). Furthermore, it left options open to the effects guys on how to portray it or whether to use any stock shots in the sequence. Sometimes being less specific is the right way to go.

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^I think this is the best way to go, at least for the moment, unless you are absolutely certain that you want to make their FTL drives instant, and I don't mean for the purpose of just simplifying things. You might want to keep this detail open, just in case the opportunity does come up to later do scenes while the ship is in FTL. If it is decided with certainty that ships in this universe travel instantly at FTL, then no one can say otherwise without creating an inconsistency.

And on a personal note, I think that realistically speaking, it is more likely that ships would warp space gradually, section by section, than first bringing the destination to the ship, and then pushing the departure point behind, all at once, unless the destination was very close by. I think that this would take a lot more energy, and then there is the concern of making sure space is restored to it's exact original form, and the more that you stretch out space, the more difficult, more energy, or more computing power or calculations that it might be to restore.

And I'm no scientist, let alone in the field of quantum mechanics or whatever subspace mechanics might belong in, but I'm quite certain that when you bend space, you must contract space to the exact same form it was in the first place, otherwise, there will be some sort of consequence, of which I don't know.

Look at the pilot episode of Star Trek and you see this double-exposure sort of technique while they're in warp, with the moving stars showing through the actors while they mime routine business - it's not instant, and yet there's no practical way they could have played scenes while using the FTL drive. Kind of the worst of both worlds, consuming running time while not moving the story forward.

As I think about it, time probably passes for our crew while traveling FTL - the jump effect at either end is like the hyperspace jump in the original Star Wars.